Relativistic Linear Spacetime Transformations Based on Symmetry |
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Authors: | Yaakov Friedman Yuriy Gofman |
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Institution: | (1) Jerusalem College of Technology, P.O. Box 16031, Jerusalem, 91160, Israel |
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Abstract: | Usually the Lorentz transformations are derived from the conservation of the spacetime interval. We propose here a way of obtaining spacetime transformations between two inertial frames directly from symmetry, the isotropy of the space and principle of relativity. The transformation is uniquely defined except for a constant e, that depends only on the process of synchronization of clocks inside each system. Relativistic velocity addition is obtained, and it is shown that the set of velocities is a bounded symmetric domain. If e=0, Galilean transformations are obtained. If e>0, the speed 1/ e and a spacetime interval are conserved. By assuming constancy of the speed of light, we get e=1/c
2 and the transformation between the frames becomes the Lorentz transformation. If e<0, a proper speed and a Hilbertian norm are conserved. |
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Keywords: | symmetry relativity principle spacetime transformation eigenvectors of spacetime transformations invariant velocity various relativity theories |
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